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A new rectangular bale multipack was designed to solve the difficulty of low efficiency, high costs and transportation inconvenience in the process of collecting rectangular bale. The rectangular bale multipack was composed of chassis, pickup, pushing bale device, raising bale device, pressuring line device and unloading bale device, etc. Based on EPEC2024 controller, the pump, motors and cylinders were drived to make some rectangular bales into one big rectangular bale. In operation, the rectangular bale multipack had the ability of collecting 12 rectangular bales at one time. The maximum driving speed of the rectangular bale multipack exceeded 20.5 km/h and the maximum hydraulic flow was 101.6 L/min. The field experiments for picking up rectangular bale and straw rectangular bale were carried out in Inner Mongolia and Liaoning Province, respectively. The test results showed that collecting bale rate and collecting bale productivity of the rectangular bale multipack was 89.5% and 12 bdl/h, respectively. Compared with artificial operation, the collecting bale efficiency was improved by 34.5%, meanwhile, the artificial costs and composite expenses were declined by 62.5% and 18.2%, respectively. The preparation cycle for long-distance transportation was also cut down. All of the works, including picking up and packing some rectangular bales were done by one operator driving the tractor simultaneously, and the rectangular bale multipack can meet reality needs.